WO2010137523A1 - Matériau adhésif redécollable - Google Patents

Matériau adhésif redécollable Download PDF

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Publication number
WO2010137523A1
WO2010137523A1 PCT/JP2010/058600 JP2010058600W WO2010137523A1 WO 2010137523 A1 WO2010137523 A1 WO 2010137523A1 JP 2010058600 W JP2010058600 W JP 2010058600W WO 2010137523 A1 WO2010137523 A1 WO 2010137523A1
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WO
WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
interface
layer
adhesive
Prior art date
Application number
PCT/JP2010/058600
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English (en)
Japanese (ja)
Inventor
かほる 新美
誠 稲永
Original Assignee
三菱樹脂株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱樹脂株式会社 filed Critical 三菱樹脂株式会社
Priority to KR1020147005487A priority Critical patent/KR101723375B1/ko
Priority to KR1020117029225A priority patent/KR101505416B1/ko
Priority to JP2011516001A priority patent/JP5514817B2/ja
Priority to EP10780478.3A priority patent/EP2436741B1/fr
Priority to US13/320,830 priority patent/US20120064338A1/en
Priority to CN201080021967.8A priority patent/CN102439105B/zh
Publication of WO2010137523A1 publication Critical patent/WO2010137523A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C09J2301/1242—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape the opposite adhesive layers being different
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the present invention relates to an adhesive material having removability capable of adhering two members (adhered bodies) and capable of being peeled off after adhesion, and an image display device using such an adhesive material. .
  • a light-transmissive protective member is often disposed on the light emitting side of the image display unit. At this time, if there is a gap, that is, an air layer, between the light-transmitting protective member and the image display unit, the emitted light from the image display unit causes interface reflection at the interface with the air layer and reaches the user.
  • the external light In addition to the loss of the emitted light, the external light also causes interface reflection at the air layer interface, so that the light transmittance of the light transmissive member is lowered, and the visibility of the image display image may be lowered. .
  • the damaged light transmissive member may be scattered when an impact such as a drop is applied to the image display device.
  • the gap between the light-transmitting protective member and the image display unit is filled with an adhesive sheet to ensure visibility and prevent scattering at the time of breakage. ing.
  • the first problem is the reliability of the adhesive surface. That is, if there is a defect in the bonding interface between the adherend and the pressure-sensitive adhesive sheet, foaming or peeling occurs at the interface. This phenomenon is caused by agglomeration of the air existing in the adhesive sheet or at the bonding interface with the adherend as a core, under high temperature (humidity) conditions or rapid temperature changes, due to environmental changes.
  • the pressure-sensitive adhesive sheet having a changed cohesive force or adhesive force cannot withstand the gas pressure of the coagulated air and causes foaming and peeling.
  • Patent Document 1 a liquid crystal in which a lower surface of a fixed electrode member of a transparent touch panel and an upper surface of a liquid crystal display are mounted through a transparent removable sheet.
  • a display-integrated transparent touch panel is disclosed, and a sheet formed by forming a transparent polymer pressure-sensitive adhesive into a gel sheet is disclosed as the transparent re-peeling sheet.
  • the touch panel side transparent adhesive layer is formed in one surface of a transparent base material
  • the display apparatus side transparent adhesive layer is formed in the other surface, and from the display surface of a display apparatus with a touch panel.
  • a double-sided PSA sheet is disclosed that is configured to be re-peelable. Specifically, by making the 180 ° peel adhesive force of the touch-panel-side transparent adhesive layer larger than that of the display-device-side transparent adhesive layer, it can be re-peeled from the display surface of the display device together with the touch panel.
  • a configuration is disclosed.
  • Patent Document 3 is configured to be detachable from at least one of the touch panel and the display surface of the display device, and is optically isotropic.
  • a double-sided PSA sheet re-peelable that can be demonstrated by making the adhesive force of the display device side adhesive layer to the display surface of the display device smaller than the adhesive force of the touch panel side adhesive layer to the adhesive surface of the touch panel The structure is disclosed.
  • Patent Documents 1 to 3 Many of the conventional adhesive materials having removability (reworkability) (see, for example, Patent Documents 1 to 3) include a touch panel and an adhesive material when bonding between two members, for example, between a touch panel and a display device. In most cases, the adhesive surface or the adhesive surface between the display device and the adhesive material can be removed again. However, since such an adhesive material needs to reduce the peeling force of the adhesive surface with the adherend in order to be re-peelable, there is a problem that the possibility of occurrence of peeling or foaming is increased. It was. That is, the re-peelability and the reliability related to the occurrence of peeling and foaming are in a trade-off relationship, and it is extremely difficult to achieve both.
  • the subject of this invention can make removability and the reliability in adhesive surfaces, such as generation
  • the present invention is an adhesive material for adhering two adherends, and can be peeled on a surface different from the adhesive surface between the adhesive material and the adherend (“
  • the present invention proposes a pressure-sensitive adhesive material having an internal peeling interface, in other words, a pressure-sensitive adhesive material having an internal peeling interface inside the pressure-sensitive adhesive layer.
  • the adhesive material of the present invention is not an adhesive surface between the adhesive material and the adherend, but has a peelable interface (internal release interface) inside the adhesive material, so regardless of this internal release interface,
  • the reliability on the adhesive surface with the adherend can be increased, for example, by increasing the adhesive force on the adhesive surface with the adherend, and defects that cause peeling or foaming can be reduced. Therefore, it is possible to achieve both removability and reliability on the adhesive surface.
  • FIG. 10 is a cross-sectional view illustrating a configuration of an adhesive material 230 as Comparative Example 3.
  • FIG. It is sectional drawing explaining the structure of the adhesive material 240 as the comparative example 4.
  • FIG. It is sectional drawing explaining the structure of the adhesive material 250 as the comparative example 5.
  • FIG. 10 is a cross-sectional view illustrating a configuration of a laminate formed as Comparative Example 6.
  • FIG. It is sectional drawing explaining the structure of the adhesive material 150 which concerns on one Example of this invention.
  • the pressure-sensitive adhesive material 101 according to the first embodiment includes at least two pressure-sensitive adhesive layers 101a and 101b, and the space between these pressure-sensitive adhesive layers 101a and 101b.
  • this pressure-sensitive adhesive material 101 includes at least two pressure-sensitive adhesive layers 101a and 101b, and the space between these pressure-sensitive adhesive layers 101a and 101b.
  • an adhesive material having a configuration that forms an interface (: internal peeling interface 101g) that can be peeled on a surface different from the pressure-sensitive adhesive surface with the adherend.
  • the delamination strength between the pressure-sensitive adhesive layers 101a and 101b is determined based on the peel strength on the bonding surface between the adherend X and the pressure-sensitive adhesive layer 101a and the bonding between the adherend Y and the pressure-sensitive adhesive layer 101b. By making it smaller than the peel strength on the contact surface, the internal peel interface 101g can be formed between the pressure-sensitive adhesive layers 101a and 101b.
  • a known release agent is applied to the surface of one or both of the pressure-sensitive adhesive layers 101a and 101b, or a low surface such as silicone-modified acrylate or fluoroalkyl-modified acrylate in one pressure-sensitive adhesive layer.
  • the interface between the pressure-sensitive adhesive layers 101a and 101b can be made the internal peeling interface 101g by reducing the surface tension by adding a tension component or the like to make a difference in the surface tension of the pressure-sensitive adhesive layers 101a and 101b.
  • At least one of the pressure-sensitive adhesive layers 101a and 101b is formed from a transparent pressure-sensitive adhesive sheet having front and back different adhesive properties as disclosed in, for example, JP-A-2006-299053, and the pressure-sensitive adhesive layer 101a, This interface can be used as the internal peeling interface 101g by adjusting the peeling force between 101b.
  • the transparent pressure-sensitive adhesive sheet having front and back different adhesive properties disclosed in JP-A-2006-299053 can be formed as described in paragraphs [0008]-[0039].
  • the surface on which the adhesive force is desired to be lower is 200 nm than the other surface.
  • crosslinking can be promoted and hardened compared to the other surface to further reduce the adhesive force.
  • a resin containing a (meth) acrylic acid ester copolymer polymer and the hydrogen abstraction type photoinitiator is formed into a sheet shape, and ultraviolet rays having a wavelength of 254 nm with respect to the front and back surfaces of the sheet are used.
  • a method for making a difference in the amount of irradiation can be mentioned.
  • an ultraviolet ray having a wavelength of 254 nm and an ultraviolet ray having a wavelength of 365 nm are irradiated on the sheet surface on one side of the sheet, while an ultraviolet ray having a wavelength of 365 nm is irradiated on the sheet surface on the other side.
  • the present adhesive material 101 only needs to have a configuration in which an adhesive layer 101g between the two adhesive layers 101a and 101b serves as an internal peeling interface 101, and other layers are laminated, for example, outside the adhesive layers 101a and 101b. Laminating other layers is optional, and a release film may be laminated as will be described later.
  • the pressure-sensitive adhesive material 102 according to the second embodiment includes at least one pressure-sensitive adhesive layer 102a, 102b and at least one layer 102d different from these pressure-sensitive adhesive layers, It is an adhesive material having a configuration in which one of the interfaces between the layer 102d and the adhesive layers 102a and 102b is an internal peeling interface.
  • At least two pressure-sensitive adhesive layers 102a and 102b and at least one base material layer 102d are provided, and between the base material layer 102d and at least one pressure-sensitive adhesive layer 102a, It can be set as the structure formed by providing the interface (: internal peeling interface 102g) which can peel in the surface different from an adhesion surface.
  • the interface (: internal peeling interface 102g) which can peel in the surface different from an adhesion surface.
  • a base material layer 102d is interposed between two adhesive layers 102a and 102b, and an internal peeling interface 102g is provided between the base material layer 102d and the adhesive layer 102a. It can be constituted as follows.
  • the peel strength between the base material layer 102d and the adhesive layer 102a, the peel strength between the adherend X and the adhesive layer 102a, the peel strength between the adherend Y and the adhesive layer 102b By making it smaller than any of the peeling strengths of the base material layer 102d and the pressure-sensitive adhesive layer 102b, an internal peeling interface 102g can be provided between the base material layer 102d and the pressure-sensitive adhesive layer 102a.
  • a transparent polymer sheet can be appropriately selected and used.
  • a material for the transparent polymer sheet in addition to polyesters such as polyethylene terephthalate and polyethylene naphthalate, in addition to various polyolefins such as acrylic, vinyl chloride, polycarbonate, polystyrene, polyurethane, polyethylene, and polypropylene, The thing which has a TAC film etc. as a main component can be illustrated.
  • the thickness of the base material layer 102d is preferably 15 ⁇ m to 200 ⁇ m, more preferably 25 ⁇ m to 100 ⁇ m, from the viewpoint of processability and cost.
  • a peeling layer can be provided on the surface of the base material layer 102d which becomes the interface with the pressure sensitive adhesive layer 102a. That's fine.
  • This release layer is made of, for example, a resin such as silicone resin, fluororesin, aminoalkyd resin, polyester resin, paraffin wax, acrylic resin, urethane resin, melamine resin, urea resin, urea-melamine, cellulose, benzoguanamine, and surface active Coating or drying (thermosetting) paints dissolved in an organic solvent or water mainly composed of these agents in an organic solvent or water using conventional printing methods such as gravure printing, screen printing, and offset printing It may be formed by curing) on a curable coating such as a curable resin, an ultraviolet curable resin, an electron beam curable resin, or a radiation curable resin. In particular, it is preferable to perform a release treatment with a silicone, a fluorine compound, an alkyd resin release agent or the like.
  • the peel strength of the release layer is, for example, the both sides of the resin constituting the release layer, for example, adjusting the skeleton and addition amount of the silicone compound, the degree of crosslinking, etc. It can be adjusted by controlling the polarity difference between the resins and the flow characteristics.
  • the thickness of the release layer is not particularly limited, and may be, for example, about 0.1 ⁇ m to 2 ⁇ m. When the thickness is less than 0.1 ⁇ m, it is difficult to peel off. On the other hand, when the thickness exceeds 2 ⁇ m, peeling is likely to be excessively caused and detachment occurs before transfer, resulting in an increase in cost.
  • the means for providing the internal peeling interface 102g between the base material layer 102d and the pressure-sensitive adhesive layer 102a is that the peeling layer is formed on the surface of the base material layer 102d that becomes the interface with the pressure-sensitive adhesive layer 102a as described above.
  • the pressure-sensitive adhesive layer 102a may be formed by selecting a material constituting the base material layer 102d and a pressure-sensitive adhesive having a relatively low adhesive strength.
  • a person skilled in the art knows what kind of pressure-sensitive adhesive can be used to suppress the adhesive force. For example, it is known that a resin film having a low polarity such as polypropylene has a tendency to suppress the adhesive force with an acrylic pressure-sensitive adhesive relatively weakly and cheaply.
  • the surface of the base material layer 102d opposite to the internal peeling interface 102g may not be specially treated.
  • blasting, corona treatment Various physical and chemical treatments such as plasma treatment, flame treatment, and primer treatment may be performed.
  • an acrylic adhesive composition solution is applied to the release-treated surface and the untreated surface of a polyethylene terephthalate film formed by releasing one surface to form a release layer. What is necessary is just to cast and form an adhesive layer.
  • the present adhesive material 102 includes two adhesive layers and one base material layer, and is an adhesive material having a configuration in which an interface between the base material layer and the adhesive layer is an internal peeling interface. It is optional to provide a layer. For example, as shown in FIG. 3, three layers of pressure-sensitive adhesive layers 102a, 102b, 102c and two layers of base material layers 102d, 102e are provided, and two base material layers are provided between the two layers of pressure-sensitive adhesive layers 102a, 102b. 102d and 102e are interposed, and one adhesive layer 102c is interposed between the two base material layers 102d and 102e, and the interface between the adhesive layer 102c and one base material layer 102d (102e) is internally peeled off.
  • the structure which is the interface 102g may be sufficient. Moreover, you may laminate
  • a release agent layer 102h is provided instead of the base material layer 102d, and the space between the release agent layer 102h and at least one adhesive layer 102a is between the adherend to be bonded. It can also be configured to be a peelable interface (: internal peel interface 102g) on a surface different from the adhesive surface.
  • the release agent layer 102h includes, for example, silicone resin, fluororesin, aminoalkyd resin, polyester resin, paraffin wax, acrylic resin, urethane resin, melamine resin, urea resin, urea-melamine series, cellulose, benzoguanamine, and the like.
  • a curable coating such as a thermosetting resin, an ultraviolet curable resin, an electron beam curable resin, and a radiation curable resin.
  • it is preferably formed from silicone, a fluorine compound, an alkyd resin, or the like.
  • the peeling strength of the release agent layer 102h is, for example, adjusted on the resin constituting the release agent layer 102h, for example, the skeleton and addition amount of the silicone compound, the degree of cross-linking, etc.
  • the thickness of the release agent layer 102h is not particularly limited, and may be, for example, about 0.1 ⁇ m to 500 ⁇ m. If it is 0.1 ⁇ m or more, it is easy to peel off, and conversely if it is 500 ⁇ m or less, it is possible not only to prevent detachment before transfer but also from the viewpoint of cost.
  • the adhesive material 103 (referred to as “the present adhesive material 103”) according to the third embodiment includes at least two adhesive layers 103a and 103b and at least two base material layers 103c and 103d. And an interface (: internal peeling interface 103g) that can be peeled on a surface different from the pressure-sensitive adhesive surface to the adherend is provided between the base material layer 103c and the base material layer 103d. Adhesive material.
  • the peel strength between the base material layer 103c and the base material layer 103d is determined by the adherend X and the pressure sensitive adhesive.
  • a resin having a relatively large difference in SP value is coextruded or added appropriately to one resin.
  • An example of the method for producing the pressure-sensitive adhesive material 103 is as follows.
  • polyethylene and polymethyl methacrylate may be coextruded to form a base material layer composed of two types and two layers, and a pressure-sensitive adhesive layer may be formed on both sides thereof.
  • a liquid active energy ray-curable resin composition to a film substrate such as polyethylene terephthalate, it is cured by irradiation with active energy rays to form a substrate layer composed of two types and two layers on both sides. What is necessary is just to form an adhesive layer.
  • the adhesive material 103 includes two adhesive layers 103a and 103b and two base material layers 103c and 103d, and the interface between the base material layer 103c and the base material layer 103d serves as an internal peeling interface 103g. What is necessary is just to have the structure, and you may be provided with the other layer. A release film may be laminated as will be described later.
  • the adhesive material 104 (referred to as “the present adhesive material 104”) according to the fourth embodiment is not shown, but is provided on one surface of any one of the adhesive materials 101 to 103.
  • a pressure-sensitive adhesive material with a release film having a configuration in which a release film 104a is laminated and an arbitrary base material 104c is laminated on the other surface (referred to as “adhesive sheet laminate” in the examples described later). .
  • the peel strength at the internal peel interface (101g, 102g, 103g) is larger than the peel strength at the interface with the release film 104a (also referred to as "release interface"), and the release film What is necessary is just to make it smaller than the peeling strength of the surface which peeled 104a, and a to-be-adhered body.
  • the adhesive material 105 (referred to as “the present adhesive material 105”) according to the fifth embodiment is a release film on either side of any one of the present adhesive material 101 to the present adhesive material 103.
  • 105a and 105b is a pressure-sensitive adhesive sheet laminate (referred to as "pressure-sensitive adhesive sheet laminate" in the examples described later).
  • the peel strength at the internal peel interface (101g, 102g, 103g) is larger than the peel strength at the interface with the release films 105a, 105b (also referred to as "release interface") and What is necessary is just to make it smaller than the peeling strength of the surface which peeled mold film 105a, 105b, and a to-be-adhered body.
  • the peel strength at the interface (also referred to as “release interface”) between one release film 105a and the adhesive material (this adhesive material 101, 102, 103) is such that the release film can be suitably peeled off. It is preferable to make the peel strength different at the release interface between the other release film 105b and the adhesive (this adhesive 101, 102, 103).
  • the release film 105a is peeled off and the exposed surface is attached to the adherend, and then the release film 105b is peeled off and the exposed surface is attached to another covered surface.
  • the work to adhere to the adherend can be carried out smoothly and reliably, the reliability of the adhesive surface with the adherend can be further increased, and defects that cause peeling and foaming can be further reduced. it can.
  • after bonding an adherend in this way it can peel again via the internal peeling interface which is not an adhesion surface with an adherend.
  • the above (B) / (A) is particularly preferably 1.5 to 2.5.
  • the above (C) / (B) is particularly preferably from 1.5 to 5.0.
  • the composition of the adhesive constituting each adhesive layer can be arbitrarily selected.
  • the adhesive strength for example, adjust the glass transition temperature, the amount of polar components / aggregation components of the main polymer constituting the pressure-sensitive adhesive layer, or adjust the amount of crosslinking agent added.
  • it can be controlled by appropriately adding a tackifier or the like.
  • the base polymer (main agent) constituting the adhesive layer examples include, for example, acrylic, silicone, rubber, polyurethane, and polyester polymers as the main agent of the adhesive. Above all, in terms of transparency, durability and cost, acrylic polymers, especially acrylic ester polymers (including copolymers) are used as the base polymer (main agent), and this is crosslinked with a thermal crosslinking agent or UV crosslinking agent. It is preferable to form an adhesive layer.
  • acrylic monomer and methacrylic monomer used for synthesizing the acrylate polymer examples include 2-ethylhexyl acrylate, n-octyl acrylate, n-butyl acrylate, isodecyl acrylate, ethyl acrylate, and the like.
  • main monomers include cross-linkable monomers such as hydroxyethyl acrylate, acrylic acid, itaconic acid, glycidyl acrylate, glycidyl methacrylate, methylol acrylamide, maleic anhydride, methyl methacrylate, methyl acrylate, acrylamide, acrylonitrile, methacrylonitrile, vinyl acetate.
  • Highly agglomerated monomers and functional group-containing monomers such as styrene, fluorine acrylate, and silicone acrylate can be appropriately added.
  • known polymerization methods such as solution polymerization, emulsion polymerization, bulk polymerization, suspension polymerization and the like can be employed.
  • a thermal polymerization initiator or photopolymerization is used according to the polymerization method.
  • An acrylic ester copolymer can be obtained by using a polymerization initiator such as an initiator.
  • the weight average molecular weight in the acrylate copolymer described above is high in a range not impairing the processability, and those having about 100,000 to 1,000,000 are preferable. preferable. If the molecular weight is too low, the fluidity is too high, the cohesive force is insufficient, and the holding force and adhesion force to the adherend tend to be impaired.
  • the glass transition temperature (theoretical Tg) of the acrylate copolymer is preferably in the range of ⁇ 70 ° C. to 0 ° C., more preferably ⁇ 55 ° C. to 0 ° C.
  • a material having a theoretical Tg that is too low has a low content of highly agglomerated components and highly polar components in the polymer, and as a result, tends to be inferior in holding power and adhesion to the adherend.
  • the theoretical Tg is too high, the adhesive strength is inferior, and the pressure-sensitive adhesiveness at room temperature is impaired.
  • modifiers such as silane coupling agents, antioxidants, deterioration inhibitors, ultraviolet absorbers, tackifiers, etc.
  • the physical properties may be adjusted as appropriate.
  • the 90 ° peel strength of the internal peeling interface (101 g, 102 g, 103 g) is preferably 0.01 N / 50 mm to 7 N / 50 mm. More preferably, it is 02 N to 5 N / 50 mm. If the peel strength is 7 N / 50 mm or less, it is less likely to be inferior in re-peelability after integrating substantially non-flexible plate-like members such as an image display unit and a surface protection member in an image display device.
  • the 90 ° peel strength at the internal peel interface (101 g, 102 g, 103 g) is obtained by fixing one side of the internal peel interface and fixing the other side after making the adhesive material a strip-shaped test piece having a width of 50 mm. It can be obtained by measuring the stress applied when the film is peeled off at an angle of 90 ° at a peeling speed of 300 mm / min. That is, when the interface between the base material and the pressure-sensitive adhesive layer is an internal peeling interface, the pressure-sensitive adhesive layer is fixed to a soda lime glass plate, and the base material layer side is angled 90 ° at a peeling speed of 300 mm / min. It is sufficient to measure the stress by peeling it off.
  • one side of the base is fixed to a soda lime glass plate, and the other side of the base is peeled off at a 90 ° angle at a peeling rate of 300 mm / min. And measure the stress.
  • the 90 ° peel strength from the adherend in the pressure-sensitive adhesive materials of the present invention is preferably 3 N / 25 mm or more at a peeling speed of 5 mm / min, and preferably 5 N / 25 mm or more. It is more preferable.
  • the peeling force with the adherend interface in the low speed region satisfies the above values, long-term storage at the bonding interface with the adherend, foam resistance due to environmental changes, and reliability related to peeling can be obtained. it can.
  • 90 degree peel strength with the adherend in the adhesive material of the present invention can be measured on the assumption that the adherend is a glass plate (soda lime glass). That is, the 90 ° peel strength with respect to a glass plate (soda lime glass) is such that the pressure-sensitive adhesive surface (strip-shaped test piece) cut out to a width of 25 mm is exposed to the glass plate (soda lime glass). ) And measuring the stress applied when the film is peeled off at an angle of 90 ° at a peeling speed of 5 mm / min.
  • the present adhesive material 101 to the present adhesive material 103 are formed from a material having excellent transparency
  • the present adhesive material 101 to the present adhesive material 103 can be suitably used as an adhesive material for assembling various image display devices. That is, the adhesive materials of the present invention (the present adhesive material 101 to the present adhesive material 103) are interposed and integrated between any two optical members of, for example, a transparent cover material, a touch panel material, and an image display device.
  • an image display device can be configured.
  • this image display device includes an internal peeling interface (101g, 102g, 103g) that can be peeled off on a surface different from the adhesive surface between the adhesive material and the adherend, the optical member and the adhesive material Since it is possible to peel not from the interface but from the internal peeling interface inside the adhesive material, each of the transparent cover material, the touch panel material, and the image display device can be reused. Further, even after the transparent cover material and the image display device are bonded together, it is possible to repair or replace due to a sticking error or long-term use.
  • the surface side (for example, when measuring the interface (A), the opposite interface (B) side) is fixed to a hard base member, the end of the layer to be peeled off is peeled off, and the end is pulled by a pulling device (peeling off)
  • the layer is peeled while pulling at a peeling speed of 300 mm / min in a direction forming 90 degrees with respect to the unpeeled portion of the material to be tested, and the tensile strength is measured with a load cell to determine the peel strength at each interface. Calculated.
  • the measurement order was measured in the order of easy peeling, that is, in the order of interfaces (A), (B), and (C).
  • the peel strength of the interface (A) is determined by fixing the base material layer on the interface (B) side of the pressure-sensitive adhesive sheet laminate to a hard base member without peeling, with a double-sided tape (Nitto Denko No5000). Measurement was performed by pulling the substrate layer.
  • the peel strength at the interface (B) was measured by fixing it to soda lime glass using the adhesive surface from which the base material layer on the interface (A) side was peeled off.
  • the peel strength of the interface (C) was determined by adding a new support film (Diafoil S-100 made by Mitsubishi Plastics) to the adhesive surface of the interface (B) remaining on the soda lime glass after measuring the peel strength of the interface (B). 38 ⁇ m) was subjected to roll pressure bonding under a 23 ° C. and 65% RH environment by applying a pressure of 2 kgf for 5 seconds, and then the support film was pulled to measure the peel strength at the interface (C). In the case where peeling was not possible, “-” was shown in the table.
  • a new support film Diafoil S-100 made by Mitsubishi Plastics
  • the 90 ° peel strength measurement method for the glass surfaces of the interfaces (A) and (B) in the pressure-sensitive adhesive sheet laminates obtained in Examples 1 to 4 and Comparative Examples 1 to 5 is the separation of evaluation samples cut to a width of 25 mm.
  • the pressure-sensitive adhesive surface from which the mold film has been peeled off is applied to soda lime glass under a pressure of 2 kgf for 5 seconds in a 23 ° C. and 65% RH environment, and then the other interface or the substrate layer of the interface (C). And a new support film (Mitsubishi Resin Diafoil S-100, thickness 38 ⁇ m) was roll-bonded. And after 40-minute pressure air treatment under conditions of 40 ° C.
  • the layer is peeled while pulling the support film at a peel rate of 5 mm / min in the direction of 90 degrees.
  • the tensile strength was measured with a load cell, and the 90 ° peel strength with respect to the glass of the pressure-sensitive adhesive sheet laminate was measured. Note that “*” in the table means that the interface with the glass became a removable interface, and the peel strength at the interface was measured.
  • the pressure-sensitive adhesive sheet laminates prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were cut into 90 mm ⁇ 90 mm, and the pressure-sensitive adhesive surface exposed by peeling and removing the release film on the interface A side was 100 mm ⁇ 100 mm ⁇ thickness.
  • a 3 mm soda lime glass plate was roll-bonded under a 23 ° C. and 65% RH environment by applying a pressure of 2 kgf for 5 seconds.
  • a glass plate having a size of 100 mm ⁇ 100 mm ⁇ thickness 3 mm is overlapped on the adhesive surface exposed by peeling off the remaining release film on the other interface B side, and placed in an environment of 23 ° C. and 65% RH.
  • evaluation of removability In the evaluation sample (glass laminated sample) produced as described above, it was observed whether or not the evaluation sample (glass laminated sample) of the example was peeled by putting the scraper blade edge into the interface (C). Moreover, about the evaluation sample (glass lamination
  • adhesive sheets 10 to 40 and base sheet 50 to 60 were prepared in advance as follows.
  • Adhesive sheet 10 To 1 kg of toluene / cyclohexane diluted solution of acrylic resin copolymer (Sanyo Kasei Polysick AH310-S solid content concentration 37%), 10 g of curing agent (Sanyo Kasei Polysic SC-75) was added and mixed. (Referred to as “adhesive composition 1A”).
  • substrate layer 2A The release treatment of a transparent substrate sheet (referred to as “substrate layer 2A”) formed by applying a silicone release agent to one side of a biaxially stretched 75 ⁇ m thick polyethylene terephthalate film to form a release treatment surface 2Aa
  • the adhesive composition 1A was applied to the surface 2Aa so that the thickness after drying was 50 ⁇ m, and dried at 80 ° C. for 3 minutes to form an adhesive layer 3A.
  • the release film was formed on the surface of the adhesive layer 3A after drying.
  • 4A (Toyobo E7006, thickness 38 ⁇ m) was laminated to prepare an adhesive sheet 10 (FIG. 6).
  • the release treatment surface of a transparent resin sheet (referred to as “base material layer 2B”) formed by applying a silicone release agent to one side of a biaxially stretched 100 ⁇ m thick polyethylene terephthalate film to form a release treatment surface 2Ba.
  • the pressure-sensitive adhesive sheet 20 was prepared in the same manner as the pressure-sensitive adhesive sheet 10 except that the pressure-sensitive adhesive composition 1A was applied to 2Ba so that the thickness after drying was 25 ⁇ m and dried at 80 ° C. for 3 minutes to form the pressure-sensitive adhesive layer 3B. (FIG. 7).
  • Adhesive sheet 30 To 1 kg of SK Dyne 1451 (solid concentration 30%) manufactured by Soken Chemical Co., Ltd., 5.0 g of curing agent L-45 (manufactured by Soken Chemical Co., Ltd.) and 1.8 g of accelerator-S (manufactured by Soken Chemical Co., Ltd.) were added and mixed. A pressure-sensitive adhesive layer solution (hereinafter referred to as “pressure-sensitive adhesive composition 1B”) was prepared.
  • the release treatment surface of a transparent resin sheet referred to as “base material layer 2C” formed by applying a silicone release agent to one side of a biaxially stretched 100 ⁇ m thick polyethylene terephthalate film to form a release treatment surface 2Ca.
  • the pressure-sensitive adhesive composition 1B was applied to 2Ca so that the thickness after drying was 50 ⁇ m, and dried at 80 ° C. for 3 minutes to form a pressure-sensitive adhesive layer 3C.
  • the release film was formed on the surface of the pressure-sensitive adhesive layer 3C after drying.
  • 4B (MRF25, made by Mitsubishi Plastics, 25 ⁇ m thick) was laminated to prepare an adhesive sheet 30 (FIG. 8).
  • Adhesive sheet 40 The same as the pressure-sensitive adhesive sheet 10 except that a transparent resin sheet (referred to as “base material layer 2D”) made of a 75 ⁇ m-thick polyethylene terephthalate film (without peeling treatment) was used instead of the base material layer 2A.
  • An adhesive sheet 40 was prepared (FIG. 9).
  • Substrate sheet 50 Linear low-density polyethylene (LLDPE, NUCG-5472 manufactured by Nihon Unicar) and ethylene-acrylic acid copolymer resin (EAA, Yukalon EAA manufactured by Mitsubishi Yuka Co., Ltd.) are separately melted and coextruded to obtain a thickness.
  • a base material sheet 50 having a thickness of 40 ⁇ m was prepared, comprising a base material layer 2F made of 20 ⁇ m linear low density polyethylene and a base material layer 2E made of an ethylene-acrylic acid copolymer having a thickness of 20 ⁇ m (FIG. 10).
  • Base material sheet 60 An active energy ray-curable resin composition (manufactured by Nippon Synthetic Chemical Co., Ltd., UV7510B) is formed on one side of a biaxially stretched transparent resin sheet (referred to as “base material layer 2G”) made of a 50 ⁇ m thick polyethylene terephthalate film (no peeling treatment). : 1 kg / photopolymerization initiator Ciba Specialty Chemicals Irgacure 184: 20 g) was applied at a thickness of 25 ⁇ m, and the coating film was cured by irradiating with a high-pressure mercury lamp to irradiate ultraviolet rays so that the integrated light quantity was 600 mJ / cm 2. A cured product layer 5A was formed, and a base sheet 60 having a thickness of 75 ⁇ m was prepared (FIG. 11).
  • the pressure-sensitive adhesive composition 1A is applied to the pressure-sensitive adhesive sheet 10 on the non-adhesive surface 2Ab of the base material layer 2A (the surface not subjected to the release treatment) so that the thickness after drying is 50 ⁇ m and dried at 80 ° C. for 3 minutes. Then, the pressure-sensitive adhesive layer 3E is formed, and the release treatment surface 4Ba of the release film 4B (MRF25, thickness 25 ⁇ m, manufactured by Mitsubishi Plastics) is laminated on the surface of the pressure-sensitive adhesive layer 3E after drying, and the pressure-sensitive adhesive sheet laminate (total thickness) 175 ⁇ m) 110 (FIG. 12).
  • MRF25 thickness 25 ⁇ m, manufactured by Mitsubishi Plastics
  • the interface (A) between the release film 4A and the pressure-sensitive adhesive layer 3A, the interface (C) between the pressure-sensitive adhesive layer 3A and the base material layer 2A, and the pressure-sensitive adhesive layer 3E and the release film The 90 ° peel strength of each interface at the interface (B) with 4B was measured.
  • the 90 ° peel strength (A) at the interface (A) between the release film 4A and the pressure-sensitive adhesive layer 3A is a measured value of the 90 ° peel strength when the release film 4A is peeled from the pressure-sensitive adhesive layer 3A.
  • the 90 ° peel strength (C) of the interface (C) between the pressure-sensitive adhesive layer 3A and the base material layer 2A is a measured value of the 90 ° peel strength when the pressure-sensitive adhesive layer 3A is peeled from the base material layer 2A.
  • the 90 ° peel strength (B) at the interface (B) between the pressure-sensitive adhesive layer 3E and the release film 4B is a measured value of the 90 ° peel strength when the release film 4B is peeled from the pressure-sensitive adhesive layer 3A.
  • Example 2 On the untreated surface 2Bb of the base material layer 2B in the pressure-sensitive adhesive sheet 20, the pressure-sensitive adhesive surface exposed by peeling off the release film 4A of the pressure-sensitive adhesive sheet 10 is laminated and laminated, and after curing at 25 ° C. for 7 days, the pressure-sensitive adhesive sheet A laminate 120 (total thickness 175 ⁇ m) was created (FIG. 13).
  • the interface (A) between the release film 4A and the pressure-sensitive adhesive layer 3B, the interface (C) between the pressure-sensitive adhesive layer 3B and the base material layer 2B, and the pressure-sensitive adhesive layer 3A and the base material layer The 90 ° peel strength of each interface at the interface (B) with 2A was measured.
  • the 90 ° peel strength (A) at the interface (A) between the release film 4A and the pressure-sensitive adhesive layer 3B is a measured value of the 90 ° peel strength when the release film 4A is peeled from the pressure-sensitive adhesive layer 3B.
  • the 90 ° peel strength (C) of the interface (C) between the pressure-sensitive adhesive layer 3B and the base material layer 2B is a measured value of the 90 ° peel strength when the pressure-sensitive adhesive layer 3B is peeled from the base material layer 2B.
  • the 90 ° peel strength (B) at the interface (B) between the pressure-sensitive adhesive layer 3A and the base material layer 2A is a measured value of the 90 ° peel strength when the pressure-sensitive adhesive layer 3A is peeled from the base material layer 2A.
  • Example 3 For 1 kg of an acrylate copolymer consisting of 75 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of vinyl acetate, and 5 parts by mass of acrylic acid, an ultraviolet curable resin propoxylated pentaerythritol triacrylate (Shin Nakamura Chemical)
  • a pressure-sensitive adhesive composition 1C was prepared by mixing 20 g of ATM-4PL (manufactured by Co., Ltd.) and 10 g of photopolymerization initiator (ESACURE TZT, manufactured by Lanberti).
  • the pressure-sensitive adhesive composition 1C is melt-extruded with a thickness of 85 ⁇ m to form a pressure-sensitive adhesive composition layer 3f, and a release agent is formed on the pressure-sensitive adhesive composition layer 3f.
  • the peel-treated surface 4Ca of the film 4C (Kyosei K1571 thickness 50 ⁇ m) was laminated and laminated and pressure-bonded.
  • the adhesive layer exposed by peeling off the release film 4A of the pressure-sensitive adhesive sheet 10 was stacked on the surface of the base material layer 2E (EAA) of the base material sheet 50 to obtain a laminate.
  • the adhesive composition layer 3f is crosslinked and cured by irradiating the laminate obtained in this manner with ultraviolet rays from the release film 4C side with a high-pressure mercury lamp so that the accumulated light quantity becomes 1000 mJ / cm 2.
  • an adhesive sheet laminate (total thickness 175 ⁇ m) 130 was prepared as the adhesive layer 3F (FIG. 14).
  • the interface (A) between the base material layer 2A and the pressure-sensitive adhesive layer 3A, the interface (B) between the pressure-sensitive adhesive layer 3F and the release film 4C, and the base material layer 2F and the base material layer The 90 ° peel strength at each interface at the interface (C) with 2E was measured.
  • the 90 ° peel strength (A) at the interface (A) between the base material layer 2A and the pressure sensitive adhesive layer 3A is a measured value of the 90 ° peel strength when the pressure sensitive adhesive layer 3A is peeled from the base material layer 2A.
  • the 90 ° peel strength (B) of the interface (B) between the pressure-sensitive adhesive layer 3F and the release film 4C is a measured value of the 90 ° peel strength when the release film 4C is peeled from the pressure-sensitive adhesive layer 3F.
  • the 90 ° peel strength (C) at the interface (C) between the base material layer 2F and the base material layer 2E is a measured value of the 90 ° peel strength when the base material layer 2E is peeled from the base material layer 2F.
  • Example 4 The pressure-sensitive adhesive composition 1C prepared in the same manner as in Example 3 was extruded and applied to both surfaces of the base material sheet 60, that is, the surfaces of the cured product layer 5A and the base material layer 2D to a thickness of 50 ⁇ m. Formed. Next, a release film 4A (Toyobo E7006 thickness: 38 ⁇ m) is laminated on the surface of the adhesive composition layer 3g on the cured product layer 5A side, while the release film 4A is laminated on the surface of the adhesive composition layer 3g on the base material layer 2D side. A laminated film (total thickness 175 ⁇ m) was obtained by laminating a mold film 4D (MRF75, Mitsubishi Plastics, thickness 75 ⁇ m).
  • MRF75 Mitsubishi Plastics, thickness 75 ⁇ m
  • pressure-sensitive adhesive sheet laminate (total thickness 175 ⁇ m) 140 was prepared as pressure-sensitive adhesive layers 3G and 3G (FIG. 15).
  • the interface (A) between the pressure-sensitive adhesive layer 3G and the release film 4A, the interface (B) between the pressure-sensitive adhesive layer 3G and the release film 4D, the base material layer 2D and the cured product layer 5A The 90 ° peel strength of each interface at the interface (C) was measured.
  • the 90 ° peel strength (A) at the interface (A) between the pressure-sensitive adhesive layer 3G and the release film 4A is a measured value of the 90 ° peel strength when the release film 4A is peeled from the pressure-sensitive adhesive layer 3G.
  • the 90 ° peel strength (B) at the interface (B) between the adhesive layer 3G and the release film 4D is 90 ° peel strength when the release film 4D is peeled from the adhesive layer 3G.
  • a pressure-sensitive adhesive layer solution (hereinafter referred to as “adhesive composition 1D”) prepared by adding 2.4 g of a curing agent E-AX (manufactured by Soken Chemical Co., Ltd.) to 1 kg of SK Dyne 2094 (solid concentration 30%) manufactured by Soken Chemical Co., Ltd. "). ) Is applied to the release treatment surface of the release film 4A (Toyobo E7006 thickness 38 ⁇ m) so that the thickness after drying is 50 ⁇ m, and dried at 80 ° C. for 3 minutes to form an adhesive layer 3J.
  • a curing agent E-AX manufactured by Soken Chemical Co., Ltd.
  • SK Dyne 2094 solid concentration 30%
  • a sheet made of a thermoplastic fluororesin (tetrafluoroethylene and ethylene copolymer) (referred to as “ETFE sheet”) manufactured by Glass Co., Ltd. (Flex 25N1250NT, thickness 25 ⁇ m) 7A was laminated to produce an adhesive sheet 70.
  • the pressure-sensitive adhesive composition 1A is applied to a release-treated surface of a release film 4B (MRF25, thickness 25 ⁇ m, manufactured by Mitsubishi Plastics) so as to have a thickness of 100 ⁇ m, and dried at 80 ° C. for 3 minutes to give pressure-sensitive adhesive layer 3A. Formed. And it laminated
  • the interface (A) between the release film 4A and the adhesive layer 3J, the interface (C) between the adhesive layer 3J and the ETFE sheet 7A, and the adhesive layer 3A and the release film 4B was measured.
  • the 90 ° peel strength (A) at the interface (A) between the release film 4A and the pressure-sensitive adhesive layer 3J is a measured value of the 90 ° peel strength when the release film 4A is peeled from the pressure-sensitive adhesive layer 3J.
  • the 90 ° peel strength (C) of the interface (C) between the pressure sensitive adhesive layer 3J and the ETFE sheet 7A is a measured value of the 90 ° peel strength when the pressure sensitive adhesive layer 3J is peeled from the ETFE sheet 7A.
  • the 90 ° peel strength (B) at the interface (B) between the layer 3A and the release film 4B is a measured value of the 90 ° peel strength when the release film 4B is peeled from the pressure-sensitive adhesive layer 3A.
  • the value of 90 ° peel strength (A) is 0.38 N / 50 mm
  • the value of 90 ° peel strength (B) is 0.5 N / 50 mm
  • the value of 90 ° peel strength (C) is 0. .9 N / 50 mm.
  • the adhesive force to the glass by the side of the adhesive layer 3A was 7.0 N / 25mm.
  • Release treatment surface 2Ca of a transparent resin sheet (referred to as “base material layer 2C”) formed by applying a silicone release agent to one side of a biaxially stretched 100 ⁇ m thick polyethylene terephthalate film to form a release treatment surface 2Ca.
  • base material layer 2C a transparent resin sheet
  • the pressure-sensitive adhesive composition 1C prepared in the same manner as in Example 3 was melt-extruded at a thickness of 175 ⁇ m to form a pressure-sensitive adhesive composition layer 3f, and the release film 4B (Mitsubishi) was formed through this pressure-sensitive adhesive composition layer 3f.
  • a resin MRF25 (thickness 25 ⁇ m) was laminated and pressure-bonded to prepare a laminate.
  • the adhesive composition layer 3f is crosslinked and cured by irradiating the laminated body obtained in this manner with ultraviolet rays from the front and back sides with a high-pressure mercury lamp so that the single-side accumulated light quantity is 1000 mJ / cm 2.
  • a pressure-sensitive adhesive sheet laminate (total thickness 175 ⁇ m) 210 was prepared as the pressure-sensitive adhesive layer 3F (FIG. 16).
  • the pressure-sensitive adhesive composition 1D was applied and dried on the surface (untreated surface) of the base material layer 2D in the pressure-sensitive adhesive sheet 40 so that the thickness after drying was 50 ⁇ m, thereby forming a pressure-sensitive adhesive layer 3H. Then, a release film 4B (MRF25, thickness 25 ⁇ m, manufactured by Mitsubishi Plastics) was laminated on the surface of the pressure-sensitive adhesive layer 3H after drying, and pressure-bonded to prepare a pressure-sensitive adhesive sheet laminate (total thickness 175 ⁇ m) 240 (FIG. 19).
  • MRF25 thickness 25 ⁇ m, manufactured by Mitsubishi Plastics
  • a 75 ⁇ m thick base material layer 2J made of a biaxially stretched polyethylene terephthalate film a 25 ⁇ m removable adhesive layer 3I and a protective film 6A are laminated, while on the other side of the base material layer 2J.
  • the pressure-sensitive adhesive layer 3A is peeled and removed from the pressure-sensitive adhesive sheet 10 to form a laminate, and after curing at 25 ° C. for 7 days, a pressure-sensitive adhesive sheet laminate (total thickness 150 ⁇ m) 250 is formed. (FIG. 20).
  • the pressure-sensitive adhesive sheets obtained in Examples 1 to 5 are easy to re-peel after being made into a glass laminate, very excellent in re-peeling workability, and no remarkable change in appearance is seen in the durability test. It was.
  • the pressure-sensitive adhesive sheet laminate 210 obtained in Comparative Example 1 did not have a peelable interface and was firmly adhered to glass, so that cracking occurred during glass separation and the reworkability was poor.
  • the pressure-sensitive adhesive sheet laminate 220 obtained in Comparative Example 2 has a relatively weak adhesive force between the pressure-sensitive adhesive sheet and the glass, so that it was separable over time, but it was inferior in workability and durable because the adhesive force was weak.
  • the pressure-sensitive adhesive sheet laminate 250 obtained in Comparative Example 5 was re-peelable by gradually peeling the re-peelable pressure-sensitive adhesive side from the glass, but the bonding surface with the glass was a re-peel interface.
  • the adhesive strength was weak, and slight peeling was confirmed at the interface between the glass and the re-peeling pressure-sensitive adhesive layer.
  • the glass laminate obtained in Comparative Example 6 was filled with the adhesive, it took time and effort to remove the bubbles present in the adhesive liquid.
  • the durability of the glass laminate was excellent, but it was firmly bonded and inferior in removability.

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Abstract

La présente invention a pour objet un matériau adhésif redécollable et qui atteint également la fiabilité d'une surface adhésive par rapport au décollement, à la survenue d'un moussage, etc. La présente invention concerne spécifiquement un matériau adhésif destiné à être utilisé pour relier deux surfaces à coller et ayant une interface (interface de décollement interne), ce qui est différent de relier les surfaces du matériau adhésif avec les surfaces à coller, sur l'intérieur. Etant donné que le matériau adhésif possède l'interface de décollement interne sur l'intérieur, la fiabilité des surfaces adhésives avec les surfaces à coller peut être accrue indépendamment de l'interface de décollement interne.
PCT/JP2010/058600 2009-05-26 2010-05-21 Matériau adhésif redécollable WO2010137523A1 (fr)

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KR1020147005487A KR101723375B1 (ko) 2009-05-26 2010-05-21 재박리성을 갖는 점착재
KR1020117029225A KR101505416B1 (ko) 2009-05-26 2010-05-21 재박리성을 갖는 점착재
JP2011516001A JP5514817B2 (ja) 2009-05-26 2010-05-21 再剥離性を有する粘着材
EP10780478.3A EP2436741B1 (fr) 2009-05-26 2010-05-21 Matériau adhésif redécollable
US13/320,830 US20120064338A1 (en) 2009-05-26 2010-05-21 Adhesive material having removability
CN201080021967.8A CN102439105B (zh) 2009-05-26 2010-05-21 具有再剥离性的粘合材料

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JP2011213796A (ja) * 2010-03-31 2011-10-27 Lintec Corp 両面粘着シートおよびタッチパネル付き表示装置
JP2013512326A (ja) * 2010-03-16 2013-04-11 エルジー・ハウシス・リミテッド 粘着フィルム及びタッチパネル
JP2013108049A (ja) * 2011-11-22 2013-06-06 Nitta Corp 光学用アクリル系粘着剤組成物および光学用アクリル系粘着シート、並びにこれを用いた光学部材の取り外し方法
JP2014051599A (ja) * 2012-09-07 2014-03-20 Osaka Sealing Printing Co Ltd 粘着テープ
JP2015151521A (ja) * 2014-02-18 2015-08-24 東京応化工業株式会社 接着剤積層体及びその利用
US9221231B2 (en) 2011-11-22 2015-12-29 Samsung Display Co., Ltd. Acrylate based adhesive composition for optical use, acrylate based adhesive sheet for optical use, and method for separating optical component using the same
WO2016063405A1 (fr) * 2014-10-23 2016-04-28 リンテック株式会社 Adhésif, feuille adhésive et élément d'affichage
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JP2019056101A (ja) * 2017-06-13 2019-04-11 マクセルホールディングス株式会社 両面粘着テープ、及び薄膜部材と支持部材との積層体
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JP7139141B2 (ja) 2017-06-13 2022-09-20 マクセル株式会社 両面粘着テープ、及び薄膜部材と支持部材との積層体
US11898069B2 (en) 2017-08-25 2024-02-13 3M Innovative Properties Company Adhesive articles permitting damage free removal
WO2019142905A1 (fr) * 2018-01-18 2019-07-25 王子ホールディングス株式会社 Feuille adhésive double face et feuille adhésive double face pourvue d'une feuille antiadhésive
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JP5514817B2 (ja) 2014-06-04
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TWI495705B (zh) 2015-08-11
TW201105765A (en) 2011-02-16
KR20120023065A (ko) 2012-03-12
EP2436741B1 (fr) 2018-10-24
CN102439105A (zh) 2012-05-02
JP2014132078A (ja) 2014-07-17
EP2436741A1 (fr) 2012-04-04
EP2436741A4 (fr) 2014-01-15
JP2016006176A (ja) 2016-01-14
KR101505416B1 (ko) 2015-03-25
KR20140048313A (ko) 2014-04-23
US20120064338A1 (en) 2012-03-15

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